Apple Thoughts: Brando Offers Up Tiny External iPhone Mic

"The iPhone 3GS can be controlled by your voice, and its voice recorder app can be used to take audio notes or record whatever is going on around you. But all of this is done via the iPhone's decidedly underpowered mic. If you want to use these features on a more-than-casual basis, you might want to get an upgrade."

The true usefulness of this microphone is when you're shooting video because if you hold the iPhone 3GS in a way that provides a good grip, you often end up covering the mic. This should mitigate that quite nicely. Of course, I've already ordered one and will provide a review as soon as I get it.